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From Arjun Panday <arjun.pan...@alcatel-lucent.com>
Subject Re: [jira] [Commented] (FELIX-3128) A Service Diagnostics service and graphical WebConsole plugin
Date Tue, 04 Oct 2011 15:50:08 GMT
Thanks Carsten, excellent news!

I've sent the forms to the secretary and legal service;  awaiting for 
their acknowledgement.

Best regards,
Arjun

On 10/04/2011 09:07 AM, Carsten Ziegeler (Commented) (JIRA) wrote:
>      [ https://issues.apache.org/jira/browse/FELIX-3128?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13119928#comment-13119928
]
>
> Carsten Ziegeler commented on FELIX-3128:
> -----------------------------------------
>
> Arjun, the vote to accept your contribution has passed:
>
> http://www.mail-archive.com/dev@felix.apache.org/msg23154.html
>
> If you haven't already filed an ICLA and a Software Grant yet, then do so, since that'll
be the next requirement for proceeding.
>
> For more information see here:
>
> As stated in http://incubator.apache.org/ip-clearance/ip-clearance-template.html:
>
> A software grant must be provided to the ASF. This grant can either be done by the ASF
Corporate CLA (via Schedule B) or the traditional License Agreement. Acceptable methods of
sending the grant to the ASF includes:
>
>      snail-mail to the ASF office and/or ASF officer
>      FAXing to the ASF office and/or an ASF officer
>      Emailing the scanned document to secretary@apache.org and legal-archive@apache.org.
>
> Thanks.
>
>> A Service Diagnostics service and graphical WebConsole plugin
>> -------------------------------------------------------------
>>
>>                  Key: FELIX-3128
>>                  URL: https://issues.apache.org/jira/browse/FELIX-3128
>>              Project: Felix
>>           Issue Type: New Feature
>>           Components: Web Console
>>             Reporter: Arjun Panday
>>             Assignee: Carsten Ziegeler
>>             Priority: Minor
>>          Attachments: servicediagnostics.tar.gz
>>
>>
>> Hi all,
>> I'd like to suggest/contribute the attached project.
>> The project aims at easing diagnostics of OSGi services and finding about missing
dependencies.
>> Typically in a large system with many cascading dependencies managed by different
trackers such as DeclarativeService, DependencyManager or others, tracking the root cause
of a top level service not being started can become very cumbersome. When building service
oriented architectures, it is often the case that a single missing requirement will lock a
full stack of services, but to find that one requirement is like finding a needle in a haystack!
>> The basic idea here is to ask each dependency manager instance about its unresolved
dependencies, merge all answers and filter the result to keep only the root causes.
>> Typically, if A depends on B which depends on C which depends on D, and D is nowhere
to be found, I need only show the "C ->  D" missing requirement; if D is resolved, then
the whole stack is unlocked.
>> Similarly, if D is known by another dependency management system, but unregistered
because it depends on E which is missing, then only the "D ->  E" requirement is relevant.
>> The proposed code is composed as follows:
>> * servicediagnostics: the API package. It holds the main service interface as well
as the plugin interface, to extend to other dependency management systems
>> * servicediagnostics.impl: the implementation package. It contains plugins implementations
for org.apache.felix.scr and org.apache.felix.dependencymanager, as well as the main service
implementation.
>> * servicediagnostics.webconsole: a Felix WebConsole plugin that displays a graphical
view of the diagnostics result. Alternatively it can also show a graph of all services currently
registered in the service registry and the bundles using them. See Screenshot-notavail.png
and Screenshot-all.png. Using the Raphael graffle library (http://raphaeljs.com/graffle.html)
allows for nice interactive views of the service registry.
>> The attached package is provided as a maven project, along with a sample runner.
Simply untar the files, run mvn install and then run.sh.
>> Follow the Readme file  for details.
>> It is not perfect and still needs some improvements (in handling service filters
for instance) but as such it is already quite useful.
>> I hope you'll like the idea.
>> Regards,
>> Arjun
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